This filter generates a noise texture using the Perlin Noise algorithm. Results don't depend on the image you opened.

Filter applied with default options: Alpha=1.200 Scale=1.800 Z offset=-1.000 Iterations=3

This filter is found in the main menu under FiltersRenderNoisePerlin Noise….

Perlin Noise filter options

Presets, Input Type, Clipping, Blending Options, Preview, Merge filter, Split view
[]

These options are described in .

Alpha

Low values give sharper noise

Alpha option examples

Alpha = 0.300

Alpha option examples

Alpha = 3.600


Scale

Scale of the noise function: works like a zoom.

Z offset

Vary noise.

Z offset option examples

Z offset = -1000

Z offset option examples

Z offset = 0.900


Iterations

The number of noise octaves.

Iterations = 7